$ git clone -n https://src.fedoraproject.org/rpms/rust-smallstr.git /var/lib/mock/f39-build-1517189-35697/root/chroot_tmpdir/scmroot/rust-smallstr
Cloning into '/var/lib/mock/f39-build-1517189-35697/root/chroot_tmpdir/scmroot/rust-smallstr'...
$ git fetch origin 7483addb943a0bf2a0679a5b5828f27567275270:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-smallstr
 * [new ref]         7483addb943a0bf2a0679a5b5828f27567275270 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7483add Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild