$ git clone -n https://src.fedoraproject.org/rpms/golang-cloud-google-storage.git /var/lib/mock/f41-build-1218804-22733/root/chroot_tmpdir/scmroot/golang-cloud-google-storage
Cloning into '/var/lib/mock/f41-build-1218804-22733/root/chroot_tmpdir/scmroot/golang-cloud-google-storage'...
$ git fetch origin dfaf450b073cb7dab80225b4d0e918daac5cc809:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-cloud-google-storage
 * [new ref]         dfaf450b073cb7dab80225b4d0e918daac5cc809 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dfaf450 Update to 1.42.0