$ git clone -n https://src.fedoraproject.org/rpms/osbuild-composer.git /var/lib/mock/f39-build-2447614-61041/root/chroot_tmpdir/scmroot/osbuild-composer
Cloning into '/var/lib/mock/f39-build-2447614-61041/root/chroot_tmpdir/scmroot/osbuild-composer'...
$ git fetch origin b66fd6c75c268fcc45cd78cb4be2d3aa7d495f30:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/osbuild-composer
 * [new ref]         b66fd6c75c268fcc45cd78cb4be2d3aa7d495f30 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b66fd6c [packit] 100 upstream release