$ git clone -n https://src.fedoraproject.org/rpms/chatty.git /var/lib/mock/f40-build-1915233-25086/root/chroot_tmpdir/scmroot/chatty
Cloning into '/var/lib/mock/f40-build-1915233-25086/root/chroot_tmpdir/scmroot/chatty'...
$ git fetch origin 7bb40e1634f359f961c4327aa0e6bd6ef1d2e390:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/chatty
 * [new ref]         7bb40e1634f359f961c4327aa0e6bd6ef1d2e390 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7bb40e1 Upstream release 0.8.4 (fedora#2296219)