$ git clone -n https://src.fedoraproject.org/rpms/perl-String-CRC32.git /var/lib/mock/f45-build-26271-616/root/chroot_tmpdir/scmroot/perl-String-CRC32
Cloning into '/var/lib/mock/f45-build-26271-616/root/chroot_tmpdir/scmroot/perl-String-CRC32'...
$ git fetch origin 1c1e3268bbb931b8548ad958e54e356b66332606:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-String-CRC32
 * [new ref]         1c1e3268bbb931b8548ad958e54e356b66332606 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1c1e326 Perl 5.44 rebuild