$ git clone -n https://src.fedoraproject.org/rpms/rust-alga_derive.git /var/lib/mock/f40-build-2182741-51244/root/chroot_tmpdir/scmroot/rust-alga_derive
Cloning into '/var/lib/mock/f40-build-2182741-51244/root/chroot_tmpdir/scmroot/rust-alga_derive'...
$ git fetch origin eca8e7a291ca527f55a31b2d10ffc4091b2949e1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-alga_derive
 * [new ref]         eca8e7a291ca527f55a31b2d10ffc4091b2949e1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eca8e7a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild