$ git clone -n https://src.fedoraproject.org/rpms/ibus-fep.git /var/lib/mock/f45-build-13997-456/root/chroot_tmpdir/scmroot/ibus-fep
Cloning into '/var/lib/mock/f45-build-13997-456/root/chroot_tmpdir/scmroot/ibus-fep'...
$ git fetch origin 049f0e2e69b8dfb419920ba6a73d32a7eceece6b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ibus-fep
 * [new ref]         049f0e2e69b8dfb419920ba6a73d32a7eceece6b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 049f0e2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild