$ git clone -n https://src.fedoraproject.org/rpms/tcltls.git /var/lib/mock/f45-build-36853-708/root/chroot_tmpdir/scmroot/tcltls
Cloning into '/var/lib/mock/f45-build-36853-708/root/chroot_tmpdir/scmroot/tcltls'...
$ git fetch origin e68b36cfa5bcd9ab6eab71b47495094ab34e76a6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tcltls
 * [new ref]         e68b36cfa5bcd9ab6eab71b47495094ab34e76a6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e68b36c Fix License to TCL