$ git clone -n https://src.fedoraproject.org/rpms/libell.git /var/lib/mock/f40-build-784905-133654/root/chroot_tmpdir/scmroot/libell
Cloning into '/var/lib/mock/f40-build-784905-133654/root/chroot_tmpdir/scmroot/libell'...
$ git fetch origin cfcda5b5bbd65c6b2065c18b27ff2c741a19639e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libell
 * [new ref]         cfcda5b5bbd65c6b2065c18b27ff2c741a19639e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cfcda5b Update to 0.62