$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-DistManifest.git /var/lib/mock/f45-build-26647-618/root/chroot_tmpdir/scmroot/perl-Test-DistManifest
Cloning into '/var/lib/mock/f45-build-26647-618/root/chroot_tmpdir/scmroot/perl-Test-DistManifest'...
$ git fetch origin 1c30d3cd6cc0a08d8bbf36836515fdc6a5ad8cd5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-DistManifest
 * [new ref]         1c30d3cd6cc0a08d8bbf36836515fdc6a5ad8cd5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1c30d3c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild