$ git clone -n https://src.fedoraproject.org/rpms/os-autoinst.git /var/lib/mock/f38-build-side-42-init-devel-1348111-30695/root/chroot_tmpdir/scmroot/os-autoinst
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1348111-30695/root/chroot_tmpdir/scmroot/os-autoinst'...
$ git fetch origin 768b4be0d2306af1eb4ebab3aa4f6b5d825928ed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/os-autoinst
 * [new ref]         768b4be0d2306af1eb4ebab3aa4f6b5d825928ed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 768b4be Update to latest git, drop merged patch, sync spec