$ git clone -n https://src.fedoraproject.org/rpms/epic.git /var/lib/mock/f45-build-8205-378/root/chroot_tmpdir/scmroot/epic
Cloning into '/var/lib/mock/f45-build-8205-378/root/chroot_tmpdir/scmroot/epic'...
$ git fetch origin 6e53028891d06a8047d98f4b861903ecb92c10f3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/epic
 * [new ref]         6e53028891d06a8047d98f4b861903ecb92c10f3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6e53028 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild