$ git clone -n https://src.fedoraproject.org/rpms/mate-media.git /var/lib/mock/f45-build-18065-508/root/chroot_tmpdir/scmroot/mate-media
Cloning into '/var/lib/mock/f45-build-18065-508/root/chroot_tmpdir/scmroot/mate-media'...
$ git fetch origin f3921c460953fcc5e6461ab5c87bd8b12e8ad513:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mate-media
 * [new ref]         f3921c460953fcc5e6461ab5c87bd8b12e8ad513 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f3921c4 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild