$ git clone -n https://src.fedoraproject.org/rpms/falkon.git /var/lib/mock/f39-build-1567753-37600/root/chroot_tmpdir/scmroot/falkon
Cloning into '/var/lib/mock/f39-build-1567753-37600/root/chroot_tmpdir/scmroot/falkon'...
$ git fetch origin f530c82b5ba6bb3fc05b92d79354bb2ef06636b5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/falkon
 * [new ref]         f530c82b5ba6bb3fc05b92d79354bb2ef06636b5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f530c82 23.08.2