$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Distribution.git /var/lib/mock/f45-build-26642-618/root/chroot_tmpdir/scmroot/perl-Test-Distribution
Cloning into '/var/lib/mock/f45-build-26642-618/root/chroot_tmpdir/scmroot/perl-Test-Distribution'...
$ git fetch origin b0ed0c8cfea307fa79456b5727c69aed8f84c54a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Distribution
 * [new ref]         b0ed0c8cfea307fa79456b5727c69aed8f84c54a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b0ed0c8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild