$ git clone -n https://src.fedoraproject.org/rpms/gnome-user-share.git /var/lib/mock/f42-build-side-1-3587773-46935/root/chroot_tmpdir/scmroot/gnome-user-share
Cloning into '/var/lib/mock/f42-build-side-1-3587773-46935/root/chroot_tmpdir/scmroot/gnome-user-share'...
$ git fetch origin 92655cf95671ecf2a8e9118445865139417d8843:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-user-share
 * [new ref]         92655cf95671ecf2a8e9118445865139417d8843 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 92655cf Update to 48.1