$ git clone -n https://src.fedoraproject.org/rpms/rust-sval_serde.git /var/lib/mock/f41-build-side-1-3129176-39576/root/chroot_tmpdir/scmroot/rust-sval_serde
Cloning into '/var/lib/mock/f41-build-side-1-3129176-39576/root/chroot_tmpdir/scmroot/rust-sval_serde'...
$ git fetch origin ad120507bb31458858918025a1a57d87eff90f95:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sval_serde
 * [new ref]         ad120507bb31458858918025a1a57d87eff90f95 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ad12050 no longer needed