$ git clone -n https://src.fedoraproject.org/rpms/rust-hmac.git /var/lib/mock/f40-build-2092586-50282/root/chroot_tmpdir/scmroot/rust-hmac
Cloning into '/var/lib/mock/f40-build-2092586-50282/root/chroot_tmpdir/scmroot/rust-hmac'...
$ git fetch origin 11b8d9b5fac5e0e9ec07b370ab95ee8289d619eb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-hmac
 * [new ref]         11b8d9b5fac5e0e9ec07b370ab95ee8289d619eb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 11b8d9b Regenerate with rust2rpm v24