$ git clone -n https://src.fedoraproject.org/rpms/rust-signature_derive1.git /var/lib/mock/f40-build-2039655-48287/root/chroot_tmpdir/scmroot/rust-signature_derive1
Cloning into '/var/lib/mock/f40-build-2039655-48287/root/chroot_tmpdir/scmroot/rust-signature_derive1'...
$ git fetch origin 6989019504f6cb555be8485a67467894098cbdeb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-signature_derive1
 * [new ref]         6989019504f6cb555be8485a67467894098cbdeb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6989019 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild