$ git clone -n https://src.fedoraproject.org/rpms/kde-gtk-config.git /var/lib/mock/f41-build-857624-168154/root/chroot_tmpdir/scmroot/kde-gtk-config
Cloning into '/var/lib/mock/f41-build-857624-168154/root/chroot_tmpdir/scmroot/kde-gtk-config'...
$ git fetch origin 5120bc149b885bf929d726b59cd916b1d6813a27:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kde-gtk-config
 * [new ref]         5120bc149b885bf929d726b59cd916b1d6813a27 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5120bc1 6.2.1