$ git clone -n https://src.fedoraproject.org/rpms/rust-pyo3_0.18.git /var/lib/mock/f39-build-1509034-35422/root/chroot_tmpdir/scmroot/rust-pyo3_0.18
Cloning into '/var/lib/mock/f39-build-1509034-35422/root/chroot_tmpdir/scmroot/rust-pyo3_0.18'...
$ git fetch origin b56f6e7cfebcbc64c0fe4a8098e121e191145f06:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pyo3_0.18
 * [new ref]         b56f6e7cfebcbc64c0fe4a8098e121e191145f06 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b56f6e7 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild