$ git clone -n https://src.fedoraproject.org/rpms/rust-blocking.git /var/lib/mock/f39-build-1526134-36059/root/chroot_tmpdir/scmroot/rust-blocking
Cloning into '/var/lib/mock/f39-build-1526134-36059/root/chroot_tmpdir/scmroot/rust-blocking'...
$ git fetch origin b2fb1549281dfc8d5503096e38db8cd84bd46aa4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-blocking
 * [new ref]         b2fb1549281dfc8d5503096e38db8cd84bd46aa4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b2fb154 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild