$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Directory.git /var/lib/mock/f45-build-26618-618/root/chroot_tmpdir/scmroot/perl-Test-Directory
Cloning into '/var/lib/mock/f45-build-26618-618/root/chroot_tmpdir/scmroot/perl-Test-Directory'...
$ git fetch origin 369085032eade6b21f3677287dae8a87ceb43d2d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Directory
 * [new ref]         369085032eade6b21f3677287dae8a87ceb43d2d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3690850 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild