$ git clone -n https://src.fedoraproject.org/rpms/rust-safemem.git /var/lib/mock/f39-build-1494570-34542/root/chroot_tmpdir/scmroot/rust-safemem
Cloning into '/var/lib/mock/f39-build-1494570-34542/root/chroot_tmpdir/scmroot/rust-safemem'...
$ git fetch origin eca3aa585d2b19d589d2680c43630f87692c14dc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-safemem
 * [new ref]         eca3aa585d2b19d589d2680c43630f87692c14dc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eca3aa5 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild