$ git clone -n https://src.fedoraproject.org/rpms/butane.git /var/lib/mock/f41-build-side-1-2749801-31006/root/chroot_tmpdir/scmroot/butane
Cloning into '/var/lib/mock/f41-build-side-1-2749801-31006/root/chroot_tmpdir/scmroot/butane'...
$ git fetch origin 29d8acaed1e18885bfe50be0329bac05e2beb706:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/butane
 * [new ref]         29d8acaed1e18885bfe50be0329bac05e2beb706 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 29d8aca butane.spec: new release v0.22.0