$ git clone -n https://src.fedoraproject.org/rpms/rust-sval_serde.git /var/lib/mock/f39-build-1543923-36600/root/chroot_tmpdir/scmroot/rust-sval_serde
Cloning into '/var/lib/mock/f39-build-1543923-36600/root/chroot_tmpdir/scmroot/rust-sval_serde'...
$ git fetch origin b8a395c79783440e454bf3b548e63d293eff65c2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sval_serde
 * [new ref]         b8a395c79783440e454bf3b548e63d293eff65c2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b8a395c Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild