$ git clone -n https://src.fedoraproject.org/rpms/rust-serde_stacker.git /var/lib/mock/f45-build-44860-818/root/chroot_tmpdir/scmroot/rust-serde_stacker
Cloning into '/var/lib/mock/f45-build-44860-818/root/chroot_tmpdir/scmroot/rust-serde_stacker'...
$ git fetch origin ec525302c45e567f455a8499ca08f3c91c9ef953:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-serde_stacker
 * [new ref]         ec525302c45e567f455a8499ca08f3c91c9ef953 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec52530 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild