$ git clone -n https://src.fedoraproject.org/rpms/rust-keyvalues-serde.git /var/lib/mock/f45-build-42761-796/root/chroot_tmpdir/scmroot/rust-keyvalues-serde
Cloning into '/var/lib/mock/f45-build-42761-796/root/chroot_tmpdir/scmroot/rust-keyvalues-serde'...
$ git fetch origin 4b6001ed3385b96c8950df006dba8151c2c8ac86:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-keyvalues-serde
 * [new ref]         4b6001ed3385b96c8950df006dba8151c2c8ac86 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4b6001e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild