$ git clone -n https://src.fedoraproject.org/rpms/sleef.git /var/lib/mock/f40-build-2626196-65247/root/chroot_tmpdir/scmroot/sleef
Cloning into '/var/lib/mock/f40-build-2626196-65247/root/chroot_tmpdir/scmroot/sleef'...
$ git fetch origin ac0b91f82c85de11b5f27a3f033a84ba39528e8c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sleef
 * [new ref]         ac0b91f82c85de11b5f27a3f033a84ba39528e8c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ac0b91f Stop skipping tests; optimization bug fixed in GCC