$ git clone -n https://src.fedoraproject.org/rpms/perl-Unicode-UTF8.git /var/lib/mock/f43-perl-60958752-6586769/root/chroot_tmpdir/scmroot/perl-Unicode-UTF8
Cloning into '/var/lib/mock/f43-perl-60958752-6586769/root/chroot_tmpdir/scmroot/perl-Unicode-UTF8'...
$ git fetch origin 18323851dde79edb4ade8927fee78d7dd8c367a6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Unicode-UTF8
 * [new ref]         18323851dde79edb4ade8927fee78d7dd8c367a6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1832385 Perl 5.42 rebuild