$ git clone -n https://src.fedoraproject.org/rpms/perl-Unicode-CaseFold.git /var/lib/mock/f45-build-27322-622/root/chroot_tmpdir/scmroot/perl-Unicode-CaseFold
Cloning into '/var/lib/mock/f45-build-27322-622/root/chroot_tmpdir/scmroot/perl-Unicode-CaseFold'...
$ git fetch origin c89908da1050f255f5f190476b42a3b0228000b1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Unicode-CaseFold
 * [new ref]         c89908da1050f255f5f190476b42a3b0228000b1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c89908d Perl 5.44 rebuild