$ git clone -n https://src.fedoraproject.org/rpms/rust-serde_bytes.git /var/lib/mock/f38-build-side-42-init-devel-1141071-30426/root/chroot_tmpdir/scmroot/rust-serde_bytes
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1141071-30426/root/chroot_tmpdir/scmroot/rust-serde_bytes'...
$ git fetch origin 27c68d810ffc3c9f7dadd7647500e360fd486291:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-serde_bytes
 * [new ref]         27c68d810ffc3c9f7dadd7647500e360fd486291 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 27c68d8 Update to version 0.11.12; Fixes RHBZ#2223141