$ git clone -n https://src.fedoraproject.org/rpms/golang-github-bitly-simplejson.git /var/lib/mock/f45-build-11763-434/root/chroot_tmpdir/scmroot/golang-github-bitly-simplejson
Cloning into '/var/lib/mock/f45-build-11763-434/root/chroot_tmpdir/scmroot/golang-github-bitly-simplejson'...
$ git fetch origin 2c34d9cfdd5c01d74916a5564b01f16dda456a13:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-bitly-simplejson
 * [new ref]         2c34d9cfdd5c01d74916a5564b01f16dda456a13 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2c34d9c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild