$ git clone -n https://src.fedoraproject.org/rpms/nickle.git /var/lib/mock/f39-build-2250960-54093/root/chroot_tmpdir/scmroot/nickle
Cloning into '/var/lib/mock/f39-build-2250960-54093/root/chroot_tmpdir/scmroot/nickle'...
$ git fetch origin fd5dde9755b9c40c3f13b05a5ade8e58f2ece662:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nickle
 * [new ref]         fd5dde9755b9c40c3f13b05a5ade8e58f2ece662 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fd5dde9 Update to 2.97