$ git clone -n https://src.fedoraproject.org/rpms/tcl-pgtcl.git /var/lib/mock/f41-build-1041908-18994/root/chroot_tmpdir/scmroot/tcl-pgtcl
Cloning into '/var/lib/mock/f41-build-1041908-18994/root/chroot_tmpdir/scmroot/tcl-pgtcl'...
$ git fetch origin e1020df4e9f4af4d77bee745feb6b1b36436d6ea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tcl-pgtcl
 * [new ref]         e1020df4e9f4af4d77bee745feb6b1b36436d6ea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e1020df Eliminate use of obsolete %patchN syntax (#2283636)