$ git clone -n https://src.fedoraproject.org/rpms/mesa.git /var/lib/mock/f38-build-side-42-init-devel-1084569-29979/root/chroot_tmpdir/scmroot/mesa
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1084569-29979/root/chroot_tmpdir/scmroot/mesa'...
$ git fetch origin 8025073089ba4b3e282f61cac3445020a124cd5e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mesa
 * [new ref]         8025073089ba4b3e282f61cac3445020a124cd5e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8025073 Update to 23.1.5