$ git clone -n https://src.fedoraproject.org/rpms/perl-Clone.git /var/lib/mock/f45-build-22359-591/root/chroot_tmpdir/scmroot/perl-Clone
Cloning into '/var/lib/mock/f45-build-22359-591/root/chroot_tmpdir/scmroot/perl-Clone'...
$ git fetch origin c8f972c439075561d06438bcfd03bc6b3e8b83a7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Clone
 * [new ref]         c8f972c439075561d06438bcfd03bc6b3e8b83a7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c8f972c Perl 5.44 rebuild