$ git clone -n https://src.fedoraproject.org/rpms/libdnf.git /var/lib/mock/f40-build-734324-105858/root/chroot_tmpdir/scmroot/libdnf
Cloning into '/var/lib/mock/f40-build-734324-105858/root/chroot_tmpdir/scmroot/libdnf'...
$ git fetch origin 8f131277964c9abef27706b558e6aa9274d11df0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libdnf
 * [new ref]         8f131277964c9abef27706b558e6aa9274d11df0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8f13127 Update to 0.72.0