$ git clone -n https://src.fedoraproject.org/rpms/perl-Convert-UUlib.git /var/lib/mock/f45-build-22571-593/root/chroot_tmpdir/scmroot/perl-Convert-UUlib
Cloning into '/var/lib/mock/f45-build-22571-593/root/chroot_tmpdir/scmroot/perl-Convert-UUlib'...
$ git fetch origin 0af253173483d089be912517292bcd1d1b4fb516:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Convert-UUlib
 * [new ref]         0af253173483d089be912517292bcd1d1b4fb516 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0af2531 Perl 5.44 rebuild