$ git clone -n https://src.fedoraproject.org/rpms/xfce4-calculator-plugin.git /var/lib/mock/f41-build-side-1-2810783-32921/root/chroot_tmpdir/scmroot/xfce4-calculator-plugin
Cloning into '/var/lib/mock/f41-build-side-1-2810783-32921/root/chroot_tmpdir/scmroot/xfce4-calculator-plugin'...
$ git fetch origin 91957095891d22fc6932c2f38cdd9a5f9e786b0d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xfce4-calculator-plugin
 * [new ref]         91957095891d22fc6932c2f38cdd9a5f9e786b0d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9195709 convert GPLv2+ license to SPDX