$ git clone -n https://src.fedoraproject.org/rpms/gnome-online-accounts.git /var/lib/mock/f41-build-846102-162961/root/chroot_tmpdir/scmroot/gnome-online-accounts
Cloning into '/var/lib/mock/f41-build-846102-162961/root/chroot_tmpdir/scmroot/gnome-online-accounts'...
$ git fetch origin 54150e25b4b704982cb836a90f852d899ee54396:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-online-accounts
 * [new ref]         54150e25b4b704982cb836a90f852d899ee54396 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 54150e2 Update to 3.51.2