$ git clone -n https://src.fedoraproject.org/rpms/rust-sval_flatten.git /var/lib/mock/f40-build-2650351-66874/root/chroot_tmpdir/scmroot/rust-sval_flatten
Cloning into '/var/lib/mock/f40-build-2650351-66874/root/chroot_tmpdir/scmroot/rust-sval_flatten'...
$ git fetch origin 80ed62cf014c5da8a13853d7236e6280d9963d2c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sval_flatten
 * [new ref]         80ed62cf014c5da8a13853d7236e6280d9963d2c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 80ed62c Update to version 2.11.1; Fixes RHBZ#2256396