$ git clone -n https://src.fedoraproject.org/rpms/fex-emu.git /var/lib/mock/f41-build-side-1-3120115-39461/root/chroot_tmpdir/scmroot/fex-emu
Cloning into '/var/lib/mock/f41-build-side-1-3120115-39461/root/chroot_tmpdir/scmroot/fex-emu'...
$ git fetch origin 1161a7d8c01e0e881ac15a048982754f8712eaeb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fex-emu
 * [new ref]         1161a7d8c01e0e881ac15a048982754f8712eaeb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1161a7d Update to 2410; Fixes: RHBZ#2317071