$ git clone -n https://src.fedoraproject.org/rpms/ibus.git /var/lib/mock/f40-build-802284-143981/root/chroot_tmpdir/scmroot/ibus
Cloning into '/var/lib/mock/f40-build-802284-143981/root/chroot_tmpdir/scmroot/ibus'...
$ git fetch origin 00b12e4183987ea2809371b955eed065efceacc4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ibus
 * [new ref]         00b12e4183987ea2809371b955eed065efceacc4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 00b12e4 Bump to ibus-1.5.30-rc1