$ git clone -n https://src.fedoraproject.org/rpms/chayang.git /var/lib/mock/f39-build-2096742-50404/root/chroot_tmpdir/scmroot/chayang
Cloning into '/var/lib/mock/f39-build-2096742-50404/root/chroot_tmpdir/scmroot/chayang'...
$ git fetch origin bc1f3518d3e5fdfdccd1d5c37ca9f50e601263a0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/chayang
 * [new ref]         bc1f3518d3e5fdfdccd1d5c37ca9f50e601263a0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc1f351 Remove HPND from the license field