$ git clone -n https://src.fedoraproject.org/rpms/gnutls.git /var/lib/mock/f41-build-1044138-19024/root/chroot_tmpdir/scmroot/gnutls
Cloning into '/var/lib/mock/f41-build-1044138-19024/root/chroot_tmpdir/scmroot/gnutls'...
$ git fetch origin 113f49276567e35d9ee0695f5ac329ad4b6e83f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnutls
 * [new ref]         113f49276567e35d9ee0695f5ac329ad4b6e83f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 113f492 Build with certificate compression enabled