$ git clone -n https://src.fedoraproject.org/rpms/yajl.git /var/lib/mock/f45-build-39194-732/root/chroot_tmpdir/scmroot/yajl
Cloning into '/var/lib/mock/f45-build-39194-732/root/chroot_tmpdir/scmroot/yajl'...
$ git fetch origin ace9a63c34f56b5f7c6f9ebf3a32d3281880c695:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/yajl
 * [new ref]         ace9a63c34f56b5f7c6f9ebf3a32d3281880c695 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ace9a63 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild