$ git clone -n https://src.fedoraproject.org/rpms/krfb.git /var/lib/mock/f40-build-2393161-60531/root/chroot_tmpdir/scmroot/krfb
Cloning into '/var/lib/mock/f40-build-2393161-60531/root/chroot_tmpdir/scmroot/krfb'...
$ git fetch origin 38e3b6bfb0d0b7798a2925b6547a751682f323d7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/krfb
 * [new ref]         38e3b6bfb0d0b7798a2925b6547a751682f323d7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 38e3b6b 24.01.95