$ git clone -n https://src.fedoraproject.org/rpms/dmidiplayer.git /var/lib/mock/f41-build-side-1-2818602-33023/root/chroot_tmpdir/scmroot/dmidiplayer
Cloning into '/var/lib/mock/f41-build-side-1-2818602-33023/root/chroot_tmpdir/scmroot/dmidiplayer'...
$ git fetch origin 3674b87569ef64661b106dd2cbb8d11d50de50e2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dmidiplayer
 * [new ref]         3674b87569ef64661b106dd2cbb8d11d50de50e2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3674b87 1.7.4