$ git clone -n https://src.fedoraproject.org/rpms/perl-Image-Dot.git /var/lib/mock/f45-build-24239-602/root/chroot_tmpdir/scmroot/perl-Image-Dot
Cloning into '/var/lib/mock/f45-build-24239-602/root/chroot_tmpdir/scmroot/perl-Image-Dot'...
$ git fetch origin a23e4b09494a8f4febdeb4ebe13d86e86f899940:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Image-Dot
 * [new ref]         a23e4b09494a8f4febdeb4ebe13d86e86f899940 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a23e4b0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild