$ git clone -n https://src.fedoraproject.org/rpms/golang-github-tidwall-sjson.git /var/lib/mock/f45-build-12556-442/root/chroot_tmpdir/scmroot/golang-github-tidwall-sjson
Cloning into '/var/lib/mock/f45-build-12556-442/root/chroot_tmpdir/scmroot/golang-github-tidwall-sjson'...
$ git fetch origin b00180645f30fbf1865a69254f97e522e3ff2bad:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-tidwall-sjson
 * [new ref]         b00180645f30fbf1865a69254f97e522e3ff2bad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b001806 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild