$ git clone -n https://src.fedoraproject.org/rpms/rust-git2-curl.git /var/lib/mock/f39-build-1521689-35855/root/chroot_tmpdir/scmroot/rust-git2-curl
Cloning into '/var/lib/mock/f39-build-1521689-35855/root/chroot_tmpdir/scmroot/rust-git2-curl'...
$ git fetch origin f5a4a9fa28b0121da773d922fa425f99e78e1084:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-git2-curl
 * [new ref]         f5a4a9fa28b0121da773d922fa425f99e78e1084 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f5a4a9f Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild