$ git clone -n https://src.fedoraproject.org/rpms/golang-github-sacloud-iaas-api.git /var/lib/mock/f39-build-1768663-41501/root/chroot_tmpdir/scmroot/golang-github-sacloud-iaas-api
Cloning into '/var/lib/mock/f39-build-1768663-41501/root/chroot_tmpdir/scmroot/golang-github-sacloud-iaas-api'...
$ git fetch origin b08980fe71bef41d223cef4561f34b6721e21449:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-sacloud-iaas-api
 * [new ref]         b08980fe71bef41d223cef4561f34b6721e21449 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b08980f Remove dependency on Jaeger