$ git clone -n https://src.fedoraproject.org/rpms/python-pytoolconfig.git /var/lib/mock/f40-build-2366408-60377/root/chroot_tmpdir/scmroot/python-pytoolconfig
Cloning into '/var/lib/mock/f40-build-2366408-60377/root/chroot_tmpdir/scmroot/python-pytoolconfig'...
$ git fetch origin c06ee5d2ed3aafa168ca8cc53fdb74a0ab8873f2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-pytoolconfig
 * [new ref]         c06ee5d2ed3aafa168ca8cc53fdb74a0ab8873f2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c06ee5d Spec-file comment typo fix