$ git clone -n https://src.fedoraproject.org/rpms/google-crc32c.git /var/lib/mock/f45-build-12867-444/root/chroot_tmpdir/scmroot/google-crc32c
Cloning into '/var/lib/mock/f45-build-12867-444/root/chroot_tmpdir/scmroot/google-crc32c'...
$ git fetch origin eb27ea7c3c006893afc1ef274694365aab04a14d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/google-crc32c
 * [new ref]         eb27ea7c3c006893afc1ef274694365aab04a14d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eb27ea7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild