$ git clone -n https://src.fedoraproject.org/rpms/gsettings-desktop-schemas.git /var/lib/mock/f40-build-802459-144016/root/chroot_tmpdir/scmroot/gsettings-desktop-schemas
Cloning into '/var/lib/mock/f40-build-802459-144016/root/chroot_tmpdir/scmroot/gsettings-desktop-schemas'...
$ git fetch origin 19d7d2fa7990385650b993027a8e2f86a494b4c3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gsettings-desktop-schemas
 * [new ref]         19d7d2fa7990385650b993027a8e2f86a494b4c3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 19d7d2f Update to 46.0