$ git clone -n https://src.fedoraproject.org/rpms/golang-github-google-go-github.git /var/lib/mock/f40-build-2000576-44483/root/chroot_tmpdir/scmroot/golang-github-google-go-github
Cloning into '/var/lib/mock/f40-build-2000576-44483/root/chroot_tmpdir/scmroot/golang-github-google-go-github'...
$ git fetch origin 412fa4a540a424432baa3b172d6ab08c6828aeea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-google-go-github
 * [new ref]         412fa4a540a424432baa3b172d6ab08c6828aeea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 412fa4a Update to 55.0.0