$ git clone -n https://src.fedoraproject.org/rpms/golang-github-pquerna-ffjson.git /var/lib/mock/f45-build-12388-442/root/chroot_tmpdir/scmroot/golang-github-pquerna-ffjson
Cloning into '/var/lib/mock/f45-build-12388-442/root/chroot_tmpdir/scmroot/golang-github-pquerna-ffjson'...
$ git fetch origin 15d2b8d7a2a68e3a5f3c33c7d426732b947a4b4f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-pquerna-ffjson
 * [new ref]         15d2b8d7a2a68e3a5f3c33c7d426732b947a4b4f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 15d2b8d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild