$ git clone -n https://src.fedoraproject.org/rpms/rust-smawk.git /var/lib/mock/f39-build-1538490-36392/root/chroot_tmpdir/scmroot/rust-smawk
Cloning into '/var/lib/mock/f39-build-1538490-36392/root/chroot_tmpdir/scmroot/rust-smawk'...
$ git fetch origin b34b26982e60040f1861b755fa249cf68210c978:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-smawk
 * [new ref]         b34b26982e60040f1861b755fa249cf68210c978 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b34b269 Update to version 0.3.2; Fixes RHBZ#2239350