$ git clone -n https://src.fedoraproject.org/rpms/fatsort.git /var/lib/mock/f45-build-8711-394/root/chroot_tmpdir/scmroot/fatsort
Cloning into '/var/lib/mock/f45-build-8711-394/root/chroot_tmpdir/scmroot/fatsort'...
$ git fetch origin 45af80a86d555194cffb68c2e0cd5e8926eaf4a4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fatsort
 * [new ref]         45af80a86d555194cffb68c2e0cd5e8926eaf4a4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 45af80a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild