$ git clone -n https://src.fedoraproject.org/rpms/vagrant.git /var/lib/mock/f38-build-side-42-init-devel-584013-26098/root/chroot_tmpdir/scmroot/vagrant
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-584013-26098/root/chroot_tmpdir/scmroot/vagrant'...
$ git fetch origin 5f94d1453b60395f6c31a1912b8c66cd11cc4e1a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vagrant
 * [new ref]         5f94d1453b60395f6c31a1912b8c66cd11cc4e1a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5f94d14 Prevent trailing space character on user agent