$ git clone -n https://src.fedoraproject.org/rpms/perl-Unicode-String.git /var/lib/mock/f41-build-723342-13111/root/chroot_tmpdir/scmroot/perl-Unicode-String
Cloning into '/var/lib/mock/f41-build-723342-13111/root/chroot_tmpdir/scmroot/perl-Unicode-String'...
$ git fetch origin 46f637d06055e50a55a0e81b6f28352e9c146361:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Unicode-String
 * [new ref]         46f637d06055e50a55a0e81b6f28352e9c146361 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 46f637d Eliminate use of obsolete %patchN syntax (#2283636)