$ git clone -n https://src.fedoraproject.org/rpms/perl-Array-RefElem.git /var/lib/mock/f45-build-21806-588/root/chroot_tmpdir/scmroot/perl-Array-RefElem
Cloning into '/var/lib/mock/f45-build-21806-588/root/chroot_tmpdir/scmroot/perl-Array-RefElem'...
$ git fetch origin c0b694ba7130f14167d51552b13e14ce3c2d4d7f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Array-RefElem
 * [new ref]         c0b694ba7130f14167d51552b13e14ce3c2d4d7f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c0b694b Perl 5.44 rebuild