$ git clone -n https://src.fedoraproject.org/rpms/rust-adblock.git /var/lib/mock/f40-build-1882996-25042/root/chroot_tmpdir/scmroot/rust-adblock
Cloning into '/var/lib/mock/f40-build-1882996-25042/root/chroot_tmpdir/scmroot/rust-adblock'...
$ git fetch origin 3742998a000e5ff9fa514398213e39bc54c7053a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-adblock
 * [new ref]         3742998a000e5ff9fa514398213e39bc54c7053a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3742998 Initial import (#2266634)