$ git clone -n https://github.com/fedora-riscv/fb303.git /var/lib/mock/f39-build-2380576-60452/root/chroot_tmpdir/scmroot/fb303
Cloning into '/var/lib/mock/f39-build-2380576-60452/root/chroot_tmpdir/scmroot/fb303'...
$ git fetch origin 9e04251834ed63fd3bbdb77096ce92a265c5947d:KOJI_FETCH_HEAD
From https://github.com/fedora-riscv/fb303
 * [new ref]         9e04251834ed63fd3bbdb77096ce92a265c5947d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9e04251 Rebuild for f39