$ git clone -n https://src.fedoraproject.org/rpms/rust-glib-macros.git /var/lib/mock/f42-build-side-114727-60966137-6587060/root/chroot_tmpdir/scmroot/rust-glib-macros
Cloning into '/var/lib/mock/f42-build-side-114727-60966137-6587060/root/chroot_tmpdir/scmroot/rust-glib-macros'...
$ git fetch origin 78ca86cc74f8b2237e1775a186c4e886bf459c29:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-glib-macros
 * [new ref]         78ca86cc74f8b2237e1775a186c4e886bf459c29 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 78ca86c Update to version 0.20.12