$ git clone -n https://src.fedoraproject.org/rpms/perl-B-COW.git /var/lib/mock/f45-build-21799-588/root/chroot_tmpdir/scmroot/perl-B-COW
Cloning into '/var/lib/mock/f45-build-21799-588/root/chroot_tmpdir/scmroot/perl-B-COW'...
$ git fetch origin 7ffde8227f54958588a0a07e7b0bd8156c03b47e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-B-COW
 * [new ref]         7ffde8227f54958588a0a07e7b0bd8156c03b47e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7ffde82 Perl 5.44 rebuild