$ git clone -n https://src.fedoraproject.org/rpms/sourcextractor++.git /var/lib/mock/f38-build-side-42-init-devel-924500-28743/root/chroot_tmpdir/scmroot/sourcextractor++
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-924500-28743/root/chroot_tmpdir/scmroot/sourcextractor++'...
$ git fetch origin 749892ccff524d5b59c52e888e6017a5e73b5a56:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sourcextractor++
 * [new ref]         749892ccff524d5b59c52e888e6017a5e73b5a56 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 749892c SourceXtractor 0.19.2