$ git clone -n https://src.fedoraproject.org/rpms/cockpit-ostree.git /var/lib/mock/f40-build-2235069-53414/root/chroot_tmpdir/scmroot/cockpit-ostree
Cloning into '/var/lib/mock/f40-build-2235069-53414/root/chroot_tmpdir/scmroot/cockpit-ostree'...
$ git fetch origin 8f2f45493528f2ec2504604236002042fc6b16b9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cockpit-ostree
 * [new ref]         8f2f45493528f2ec2504604236002042fc6b16b9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8f2f454 [packit] 198.1 upstream release