$ git clone -n https://src.fedoraproject.org/rpms/rust-os_display.git /var/lib/mock/f41-build-59195171-6571621/root/chroot_tmpdir/scmroot/rust-os_display
Cloning into '/var/lib/mock/f41-build-59195171-6571621/root/chroot_tmpdir/scmroot/rust-os_display'...
$ git fetch origin 0cac93e55b3659b77a7c1cee5e7510349628fc35:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-os_display
 * [new ref]         0cac93e55b3659b77a7c1cee5e7510349628fc35 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0cac93e Update to version 0.1.4; Fixes RHBZ#2355759