$ git clone -n https://src.fedoraproject.org/rpms/x2godesktopsharing.git /var/lib/mock/f45-build-38577-725/root/chroot_tmpdir/scmroot/x2godesktopsharing
Cloning into '/var/lib/mock/f45-build-38577-725/root/chroot_tmpdir/scmroot/x2godesktopsharing'...
$ git fetch origin 73413776f241d03b01fe1f83fd212abb48accdb1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/x2godesktopsharing
 * [new ref]         73413776f241d03b01fe1f83fd212abb48accdb1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7341377 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild