$ git clone -n https://src.fedoraproject.org/rpms/perl-Unicode-Casing.git /var/lib/mock/f45-build-27326-622/root/chroot_tmpdir/scmroot/perl-Unicode-Casing
Cloning into '/var/lib/mock/f45-build-27326-622/root/chroot_tmpdir/scmroot/perl-Unicode-Casing'...
$ git fetch origin 301ee2354a06653ca5fe323296268d5918021cdb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Unicode-Casing
 * [new ref]         301ee2354a06653ca5fe323296268d5918021cdb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 301ee23 Perl 5.44 rebuild