$ git clone -n https://src.fedoraproject.org/rpms/dropbox-api-command.git /var/lib/mock/f39-build-2164991-50975/root/chroot_tmpdir/scmroot/dropbox-api-command
Cloning into '/var/lib/mock/f39-build-2164991-50975/root/chroot_tmpdir/scmroot/dropbox-api-command'...
$ git fetch origin 88ee7567ef28fb6bef8d07d96cb4455778c1ccbf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dropbox-api-command
 * [new ref]         88ee7567ef28fb6bef8d07d96cb4455778c1ccbf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 88ee756 Fix manpages in filelists (rhbz#2189098)