$ git clone -n https://src.fedoraproject.org/rpms/oscillatord.git /var/lib/mock/f42-build-side-1-3499044-45964/root/chroot_tmpdir/scmroot/oscillatord
Cloning into '/var/lib/mock/f42-build-side-1-3499044-45964/root/chroot_tmpdir/scmroot/oscillatord'...
$ git fetch origin 74fd984e64e993ff9ed164dfdf10c604f3a4372d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/oscillatord
 * [new ref]         74fd984e64e993ff9ed164dfdf10c604f3a4372d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 74fd984 Update to 3.8.3