$ git clone -n https://src.fedoraproject.org/rpms/perl-Tk-ToolBar.git /var/lib/mock/f41-build-1211679-22574/root/chroot_tmpdir/scmroot/perl-Tk-ToolBar
Cloning into '/var/lib/mock/f41-build-1211679-22574/root/chroot_tmpdir/scmroot/perl-Tk-ToolBar'...
$ git fetch origin 4f08fef554dc5cb4e0be94ab8e61a516af45db30:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Tk-ToolBar
 * [new ref]         4f08fef554dc5cb4e0be94ab8e61a516af45db30 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4f08fef Eliminate use of obsolete %patchN syntax (#2283636)