$ git clone -n https://src.fedoraproject.org/rpms/koji-tool.git /var/lib/mock/f39-build-1884131-42771/root/chroot_tmpdir/scmroot/koji-tool
Cloning into '/var/lib/mock/f39-build-1884131-42771/root/chroot_tmpdir/scmroot/koji-tool'...
$ git fetch origin 7d988b0f80bc96c4921dbc1d9fa1aefb634c81b2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/koji-tool
 * [new ref]         7d988b0f80bc96c4921dbc1d9fa1aefb634c81b2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7d988b0 https://hackage.haskell.org/package/koji-tool-1.1.1/changelog