$ git clone -n https://src.fedoraproject.org/rpms/bitlbee.git /var/lib/mock/f42-build-3346734-45002/root/chroot_tmpdir/scmroot/bitlbee
Cloning into '/var/lib/mock/f42-build-3346734-45002/root/chroot_tmpdir/scmroot/bitlbee'...
$ git fetch origin ec37961d4cbf04a61232f8ee0219ef8559df2e56:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bitlbee
 * [new ref]         ec37961d4cbf04a61232f8ee0219ef8559df2e56 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec37961 Handle unify of /usr/bin and /usr/sbin (#2339932)