$ git clone -n https://src.fedoraproject.org/rpms/perl-Template-Timer.git /var/lib/mock/f45-build-26491-617/root/chroot_tmpdir/scmroot/perl-Template-Timer
Cloning into '/var/lib/mock/f45-build-26491-617/root/chroot_tmpdir/scmroot/perl-Template-Timer'...
$ git fetch origin 8be1d95e075fb4c14df572d04d08a3bd14f3adb1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Template-Timer
 * [new ref]         8be1d95e075fb4c14df572d04d08a3bd14f3adb1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8be1d95 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild