$ git clone -n https://src.fedoraproject.org/rpms/golang-github-bmizerany-assert.git /var/lib/mock/f38-build-side-42-init-devel-642800-26393/root/chroot_tmpdir/scmroot/golang-github-bmizerany-assert
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-642800-26393/root/chroot_tmpdir/scmroot/golang-github-bmizerany-assert'...
$ git fetch origin b66af8f893e8e2f381b3b04263c7becec905022d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-bmizerany-assert
 * [new ref]         b66af8f893e8e2f381b3b04263c7becec905022d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b66af8f Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild