$ git clone -n https://src.fedoraproject.org/rpms/kf5-libkcddb.git /var/lib/mock/f45-build-15076-468/root/chroot_tmpdir/scmroot/kf5-libkcddb
Cloning into '/var/lib/mock/f45-build-15076-468/root/chroot_tmpdir/scmroot/kf5-libkcddb'...
$ git fetch origin c0c2d2a1ebaba44fbf7cc7ea0a77288f610932f1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-libkcddb
 * [new ref]         c0c2d2a1ebaba44fbf7cc7ea0a77288f610932f1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c0c2d2a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild