$ git clone -n https://src.fedoraproject.org/rpms/eom.git /var/lib/mock/f40-build-2226343-52922/root/chroot_tmpdir/scmroot/eom
Cloning into '/var/lib/mock/f40-build-2226343-52922/root/chroot_tmpdir/scmroot/eom'...
$ git fetch origin b18fca1cbd5874c6ad427b164351b79906eea334:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/eom
 * [new ref]         b18fca1cbd5874c6ad427b164351b79906eea334 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b18fca1 fix building with libxml 2.12.0