$ git clone -n https://src.fedoraproject.org/rpms/xgrep.git /var/lib/mock/f45-build-38884-730/root/chroot_tmpdir/scmroot/xgrep
Cloning into '/var/lib/mock/f45-build-38884-730/root/chroot_tmpdir/scmroot/xgrep'...
$ git fetch origin 93b424d5eafc60b1e3bf2f314aa585616ba59a72:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xgrep
 * [new ref]         93b424d5eafc60b1e3bf2f314aa585616ba59a72 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 93b424d remove imake dependency, back to build for all arches