$ git clone -n https://src.fedoraproject.org/rpms/cosmic-app-library.git /var/lib/mock/f41-build-side-1-3102809-39354/root/chroot_tmpdir/scmroot/cosmic-app-library
Cloning into '/var/lib/mock/f41-build-side-1-3102809-39354/root/chroot_tmpdir/scmroot/cosmic-app-library'...
$ git fetch origin 8324ac591f96a839cc33b5f8648cfb37634bd00e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cosmic-app-library
 * [new ref]         8324ac591f96a839cc33b5f8648cfb37634bd00e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8324ac5 "Update to 1.0.0~alpha.3"