$ git clone -n https://src.fedoraproject.org/rpms/rust-const-oid0.6.git /var/lib/mock/f40-build-2224350-52780/root/chroot_tmpdir/scmroot/rust-const-oid0.6
Cloning into '/var/lib/mock/f40-build-2224350-52780/root/chroot_tmpdir/scmroot/rust-const-oid0.6'...
$ git fetch origin 1e21348faafc0502ffbe9df21edb82b5adb2e179:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-const-oid0.6
 * [new ref]         1e21348faafc0502ffbe9df21edb82b5adb2e179 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1e21348 Regenerate with rust2rpm v25