$ git clone -n https://src.fedoraproject.org/rpms/perl-Log-Log4perl.git /var/lib/mock/f45-build-24537-604/root/chroot_tmpdir/scmroot/perl-Log-Log4perl
Cloning into '/var/lib/mock/f45-build-24537-604/root/chroot_tmpdir/scmroot/perl-Log-Log4perl'...
$ git fetch origin 297b970d8c4d1f047a39ce1d6a48b86876a8d796:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Log-Log4perl
 * [new ref]         297b970d8c4d1f047a39ce1d6a48b86876a8d796 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 297b970 1.58 bump (rhbz#2516179)