$ git clone -n https://src.fedoraproject.org/rpms/rust-unic-locale.git /var/lib/mock/f42-build-side-115233-61078710-6588764/root/chroot_tmpdir/scmroot/rust-unic-locale
Cloning into '/var/lib/mock/f42-build-side-115233-61078710-6588764/root/chroot_tmpdir/scmroot/rust-unic-locale'...
$ git fetch origin bd50e52ce813289ef76cac8bf213fd69956c867c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-unic-locale
 * [new ref]         bd50e52ce813289ef76cac8bf213fd69956c867c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bd50e52 Update to version 0.9.6; Fixes RHBZ#2365360