$ git clone -n https://src.fedoraproject.org/rpms/tcl-tclreadline.git /var/lib/mock/f41-build-1041909-18994/root/chroot_tmpdir/scmroot/tcl-tclreadline
Cloning into '/var/lib/mock/f41-build-1041909-18994/root/chroot_tmpdir/scmroot/tcl-tclreadline'...
$ git fetch origin 9d239a4a6b2e97742aba2595671d29683d8de19b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tcl-tclreadline
 * [new ref]         9d239a4a6b2e97742aba2595671d29683d8de19b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9d239a4 Eliminate use of obsolete %patchN syntax (#2283636)