$ git clone -n https://src.fedoraproject.org/rpms/perl-Unicode-LineBreak.git /var/lib/mock/f45-build-27327-622/root/chroot_tmpdir/scmroot/perl-Unicode-LineBreak
Cloning into '/var/lib/mock/f45-build-27327-622/root/chroot_tmpdir/scmroot/perl-Unicode-LineBreak'...
$ git fetch origin ee01362d26c01cb6932ec8eec975c6cba26d682b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Unicode-LineBreak
 * [new ref]         ee01362d26c01cb6932ec8eec975c6cba26d682b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ee01362 Perl 5.44 rebuild